Warp stop-motion for looms



No. 608,558 Patented Aug. 2, I898.

' L J. H. uon'rnnor.

WARP STOP uonon run LOUIS.

(No Model.)

UNITED STATES PATENT OFFICE.

JAMES n. NORTHROP, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR To THE DRAPERCOMPANY, OF SAME PLAoE AND PORTLAND, MAINE.

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 608,558, dated August2, 1898. Application filed February 25, 1898. Serial No. 671,562. (Nomodel.)

ment in Warp Stop-Motions for Looms, of-

which the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

In United States Patent NO. 594,355, dated November 23, 1897, awell-known type of warp stop-motion is shown wherein the breakage orundue slackness of a warp-thread is made operative to effect stoppage ofthe loom by or through the movement of an actuating-detector intoposition to engage and stop a normally vibrating feeler. The detectorsare usually made of thin fiat strips of Sheetjmetal, each having awarp-receiving eye, and the feeler engages the upright edge of anabnormally-positioned detector, the edge of'the feeler being serrated toprevent any undue lateral twisting of the engaged detector.

Various forms of feeler have been devised with the object of minimizingthe possible damage to detectors when engaged; and my present inventionrelates more particularly to the construction of the feeler.

Figure l is a transverse sectional view of a loom having a warpstop-motion applied thereto embodying my invention. Fig. 2 is anenlarged cross-section of the feeler shown in Fig. 1; and Fig. 3, inplan View, is a detail showing the form of feeler and back-stop asillustrated in the United States patent referred to hereinbefore.

Referring to Fig. 1, the shipper-lever S, the knock-off arm a and itsactuating mechanism, the vertically-reciprocated frames sup porting theWarp-stop-motiomactuating detectors m m, and "the rock-shaft h and itsoperating mechanism maybe and are substantially as in the patentreferred to, like parts being similarly lettered herein. The rock-shafthas fast thereon yoke-like arms 71. to the upper ends of which areattached two like and parallel vibrators or feelers to cooperate Withthe two sets of detectors 'm m, the latter being separated'at' theirlower ends by a flat plate or bar 72-, preventing their interminglingand serving also as a stop for a dropped detector when engaged by avibrator.

In my present invention the acting portion of the vibrator or feeler ismade of yielding material, such as felt or rubber, which will give oryield when engaging the edge of the detector, preventing bending ortwisting thereof.

' The strip h of yielding material, of felt, 6o

rubber, or other suitable material, may be conveniently held in a stripof metal 72, bent into substantially U shape and attached to the arms7L7 by suitable screws or rivets 7L Fig. 2. Preferably these screwsenter a plate orjbar h extended the length of the holder h and suitablysecured to the arms to afford a firm support for the feeler or vibrator.

In the United States patent referred to both the feelers it it and theplate n are provided tain the same results with less danger to thedetectors. 1

My invention is not restricted to the precise construction herein shown,nor to the arrangement of detectors illustrated, for obviously a feeleror vibrator having a yielding 8o edge portion to engage the detector maybe employed with other arrangements of detectors and with any suitablemechanism for effecting stoppage of the loom when the movement of thefeeler is stopped by engagement with a dropped detector.

Having fully described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a loom, a series of Warp-stop-motionactuating detectors movableinto operative position by breakage or undue slackness of thewarp-threads, a cooperating vibrator comprising a strip of yieldingmaterial, and a holder of rigid material having two opposed 5 Wallsbetween'which the yielding material is held and beyond the edges ofwhich it pro jeets, to engage a dropped detector, and stopping mechanismfor the loom, operated by or through stoppage of the movement of the Vi-I00 brator. I V I 2. In a warp-stop-motion mechanism for In testimonywhereof I have signed my name to this specification in the presence oftwo subscribing witnesses.

JAMES H. NOR'IIIROP.

\Vi tn esses:

Hnnnnmi S. MANLEY, Geo. ()'r1s DRAIEH.

